Seiko Cal. 6639 - 336

The Seiko 6639-336 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-84a983d07a55]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1971

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